Where are you saying they started? The one to the lefty wound up about 6 inches off the plate, which means to break 18 inches, it would have started on the outer half, which I don't see. The one to the righty might have gotten a foot off the plate, but again, that would mean it had to start almost in the middle to break 18 inches. Typically you throw the cutter on the inner half/corner and want it to break in off the plate after the batter has already started to swing.

A quick search of some write-ups suggests his average cutter breaks about 5 inches.

OK, both hitters are at least a plate length away from the plate. The one to the righty looks like it would have almost hit his rear hip if he hadn't swung. Are you suggesting he swung at a pitch that wasn't even on the plate?

Are you suggesting fangraphs, the site you just used, is wrong in their measurements. You're simply going by what your eyes tell you (or shockingly refusing to admit you're wrong). Actual measurements show his pitches don't even break a foot, much less 2. Again, watch the catcher's glove. It moves 6-8 inches on the Rasmus pitch